@anchan828/json-ast/dist/esm/error.js

JSON parser AST utilities

function showCodeFragment(source, linePosition, columnPosition) {
    const lines = source.split(/\n|\r\n?|\f/);
    const line = lines[linePosition - 1];
    const marker = new Array(columnPosition).join(" ") + "^";
    return `${line}\n${marker}`;
}
class ParseError extends SyntaxError {
    constructor(message, source, linePosition, columnPosition) {
        const fullMessage = linePosition
            ? message + "\n" + showCodeFragment(source, linePosition, columnPosition)
            : message;
        super(fullMessage);
        this.message = message;
    }
}
export function error(message, source, line, column) {
    throw new ParseError(message, source, line, column);
}